Okrimenko O. General principles of hobbing cutters design theory

The thesis approaches the issue of hobbing cutters design theory general principles considering the kinematics of gears milling. The principles are the basis for informational support new level CAD hobs. The theory of shaping the spur gears surface by worm mills has been developed, which is based on a real kinematic model of the process. The new approaches to the greater accuracy hobs designing, due to the choice of rational parameters of the initial contour milling, have been outlined on the basis of the developed theory of the spur gears surface shaping by worm mills. In terms of the regrinding surfaces and indexable cutters selection and analysis, we have schemed out the recommendations on the improvement of tool shaping surfaces accuracy fabrication and also on the enhancing of technological fabrication efficacy and the operation cost reduction. The theory of the cutting hobs geometric parameters determination in static and kinematic systems has been refined. The theory resides in the registration of all cutter and wheel movements in the processing and determination of the main movement of cutting mills, which is a cutter and a wheel co-rotation. The refined theory for the cutting hobs load determination has been developed. On the basis of the research we have worked out a general algorithm and recommendations on the hobs designing, which implement the task of hobs designing in terms of the issue multivariance and the choice of the most appropriate option that would meet the tool's given conditions of operation. The new advanced milling design and spur gears processing techniques by worm mills have been schemed out, the experimental verification of the proposed cutter designing has been performed and the gears accuracy enhancement by this tool and the tool technological fabrication effectiveness have been evidenced. Keywords: cutting tools, gear cutting, gear, worm mill, hob, shaping.